Linux/AM3715: MLO questions

Hi,

1. No.
2. No.
3. No way.

I have notified the software team. The can add further comments here.

Hi Biser,

Thanks for the reply.
There is definitely some mystery here.
I have erased nand, removed sd card, and validated that the board does not boot after reseting.
Only after using flash serial with u-boot download, I get u-boot prompt, so I assume it is the u-boot from serial.

I also don't understand how we can load both MLO and u-boot with the flash tool.
If I downloading MLO, and want to download u-boot, I must reset again the board, otherwise the flash utility shall not start downloading.
Which means that all MLO initialization will be erased... So How do you acheive both MLO & u-boot download.

I also don't understand how we can load u-boot to RAM, the options are only NAND or SDRAM in flash tool, which means we can't load it to any memory other than these two options.

Thank you,
Ran

Hi Ran,

Could you post steps in details which you are follow to got u-boot prompt?

BR
Tsvetolin Shulev

Hi Tsvetolin Shulev

,

I've repeated the test, but now I don't get u-boot prompt, so I am not sure about previous results now...
I am trying to load u-boot from serial.
I am not sure about the exact steps to achive that.
I think I need first to load MLO, but after MLO load how should I load u-boot, if I must reset between these 2 operations when used with flash tool ?

Anyhow, on trying to load u-boot I

I chose SDRAM, uart port: 5, I then press GO, and then reset board, and see the following:

Console program success, exit code: 0
¯ -stdout
¯ -omap 3
¯ -no_force_package_alignment
¯ -com 5
¯ -t 60
¯ -p CUSTOM_AM37XX_BOARD
¯ -2
¯ chip_download SDRAM E:\u-boot.bin
¯ Leaving parameter file:temp_script.txt
¯ @temp_script.txt
¯ Looking for device (omap com5)
¯ Please turn off device, then turn it on again
¯ Awaiting ASIC id
Console program aborted or crashed, exit code: 62097
¯ -stdout
¯ -omap 3
¯ -no_force_package_alignment
¯ -com 5
¯ -t 60
¯ -p CUSTOM_AM37XX_BOARD
¯ -2
¯ chip_download SDRAM E:\u-boot.bin
¯ Leaving parameter file:temp_script.txt
¯ @temp_script.txt
¯ Looking for device (omap com5)
¯ Please turn off device, then turn it on again
¯ Awaiting ASIC id
¯ AsicId items 04
¯ AsicId id 01 05 01 36 30 07 07
¯ AsicId secure_mode 13 02 01 00
¯ AsicId public_id 12 15 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
¯ AsicId root_key_hash 14 15 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
¯ Searching 2nd for: CUSTOM_AM37XX_BOARD 363007 07 GP
¯ Loading second file Targets\2nd-Downloaders\dnld_startup_omap3_gp_2g.2nd
¯ Entering parameter file:omapflash2nd.txt at line: 9
¯ -pheriphalboot_reopen
¯ Reading board configuration file Targets\Configurations\configuration_custom_am37xx.txt
¯ Reading definition file .\targets\definitions\definitions_omap3.txt
¯ -board_config Targets\Configurations\configuration_custom_am37xx.txt
¯ Leaving parameter file:omapflash2nd.txt
¯ Sending size of second file (0x00006804 bytes)
¯ Transferring second file to target (0x6804 bytes)
¯ Closing boot connection
¯ Found device (omap com5)
¯ Waiting for 2nd
¯ Found 2nd
¯ Looking for a driver for 'SDRAM'
¯ No driver required for 'SDRAM'
¯ Downloading
¯ Downloading 'E:\u-boot.bin'

¯ Sending data (457312 bytes) :................... [32764]
¯ Sending data (457312 bytes) ::::::::::::........ [294876]
¯ Sending data (457312 bytes) :::::::::::::::::::: [457312]
¯ Sending data (457312 bytes) :::::::::::::::::::: [457312]
¯ Downloading complete
¯ Elapsed time: 0:39.827 (11725 bytes/s)
¯ Elapsed time: 0:00.000

Console program success, exit code: 0

Then I tried to open serial terminal with com 5, but I get no prompt now.

What is the procedure to get u-boot download and running from serial ?

Regards,
Ran

Hi Tsvetolin Shulev,

I would add that this is the same MLO, u-boot images I load from nand ( no change)

Thank you!
Ran

Hi,

On repeating the same test with "download and execute" instead of "download" I do succeed to get u-boot prompt !
Yet, I have still some doubts as written before (MLO not used , DDR initialization in u-boot (?), SDRAM size smaller than u-boot size)


Console program success, exit code: 0
¯ -stdout
¯ -omap 3
¯ -no_force_package_alignment
¯ -com 5
¯ -t 60
¯ -p CUSTOM_AM37XX_BOARD
¯ -2
¯ chip_download SDRAM C:\Documents and Settings\Administrator\My Documents\u-boot.bin
¯ command branch SDRAM 0x00000000
¯ Leaving parameter file:temp_script.txt
¯ @temp_script.txt
¯ Looking for device (omap com5)
¯ Please turn off device, then turn it on again
¯ Awaiting ASIC id
¯ AsicId items 04
¯ AsicId id 01 05 01 36 30 07 07
¯ AsicId secure_mode 13 02 01 00
¯ AsicId public_id 12 15 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
¯ AsicId root_key_hash 14 15 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
¯ Searching 2nd for: CUSTOM_AM37XX_BOARD 363007 07 GP
¯ Loading second file Targets\2nd-Downloaders\dnld_startup_omap3_gp_2g.2nd
¯ Entering parameter file:omapflash2nd.txt at line: 9
¯ -pheriphalboot_reopen
¯ Reading board configuration file Targets\Configurations\configuration_custom_am37xx.txt
¯ Reading definition file .\targets\definitions\definitions_omap3.txt
¯ -board_config Targets\Configurations\configuration_custom_am37xx.txt
¯ Leaving parameter file:omapflash2nd.txt
¯ Sending size of second file (0x00006804 bytes)
¯ Transferring second file to target (0x6804 bytes)
¯ Closing boot connection
¯ Found device (omap com5)
¯ Waiting for 2nd
¯ Found 2nd
¯ Looking for a driver for 'SDRAM'
¯ No driver required for 'SDRAM'
¯ Downloading
¯ Downloading 'C:\Documents and Settings\Administrator\My Documents\u-boot.bin'

¯ Sending data (457312 bytes) :................... [32764]
¯ Sending data (457312 bytes) ::::::::::::........ [294876]
¯ Sending data (457312 bytes) :::::::::::::::::::: [457312]
¯ Sending data (457312 bytes) :::::::::::::::::::: [457312]
¯ Downloading complete
¯ Elapsed time: 0:40.348 (11432 bytes/s)
¯ branch SDRAM 0x00000000
¯ Elapsed time: 0:00.000

Console program success, exit code: 0

Best Regards,
Ran

Hi,

Is it possible that the flash tool actually does DDR initialization, so that the image is loaded into RAM ?

Thank you,
Ran